B.J. Penn

Baby Jay "B.J." Penn has stunned MMA fans for years with his phenomenal display of Brazilian Jiu-Jitsu and incredible striking.

As of right now, B.J. Penn remains one of two men in the UFC to have ever won titles in two different weight classes.

In the storied career of Penn, he has defeated such fighters as Matt Hughes, Sean Sherk, Renzo Gracie, Takanori Gomi (before he became Pride lightweight champion), and Kenny Florian in dominant fashion.

At UFC 127, Penn will look to continue his legacy as a dominant fighter when he meets Jon Fitch.

Fedor Emelianenko

Fedor Emelianenko is known as one of the greatest heavyweights to have ever stepped into MMA.

Up until his loss to Fabricio Werdum, Emelianenko had one of the longest win streaks in MMA with 10 years of dominance.

Known in his come country of Russia as an elite Sambo stylist, Fedor's biggest accomplishment in MMA is capturing the Pride heavyweight title, when he dominated Antonio Rodrigo Nogueira to capture the belt.

Since 2006, Silva has yet to lose a single fight, continues to set records in the sport of mixed martial arts and has beaten the likes of Rich Franklin, Chael Sonnen, Forrest Griffin, Dan Henderson, Chael Sonnen, Nate Marquardt, and now Vitor Belfort.

The most incredible part about Anderson Silva is that after all the records he's broken and all the title defenses, he may end up retiring undefeated in his UFC career.